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An Unprovable Ramsey-Type Theorem
Martin Loebl and Jaroslav Nešetřil
Proceedings of the American Mathematical Society
Vol. 116, No. 3 (Nov., 1992), pp. 819-824
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2159452
Page Count: 6
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We present a new proof of the Paris-Harrington unprovable (in PA) version of Ramsey's theorem. This also yields a particularly short proof of the Ketonen-Solovay result on rapidly growing Ramsey functions.
Proceedings of the American Mathematical Society © 1992 American Mathematical Society